Questions

Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.

Crude mineral oil comes out of the earth as a thick brown or black liquid with a strong smell. It is a complex mixture of many different substances, each with its own individual qualities. Most of them are combinations of hydrogen and carbon in varying proportions. Such hydrocarbons are also found in other forms such as bitumen, asphalt and natural gas. Mineral oil originates from the carcasses of tiny animals and from plants that live in the sea. Over million of years, these dead creatures form large deposits under sea­bed and ocean currents cover them with a blanket of sand and silt. As this material hardens, it becomes sedimentary rock and effectively shuts out the oxygen, thus preventing the complete decomposition of the marine deposits underneath. The layers of sedimentary rocks become thicker, and heavier. Their pressure produces heat, which transforms the tiny carcasses into crude oil in a process that is still going on today.

The time taken for the marine deposits to harden into rocks is

What qualities does a person need to be successful in the field of advertising?

The Cabinet Committee on Economic Affairs (CCEA) has approved expansion of "Beti Bachao Beti Padhao" yojana for a pan India coverage from 2017-2018 to _____.

Which of the following is a renewable resource of energy?

Which is required for karst topography to form?

The part of the Himalayas lying between Satluj and Kali rivers is known as ____________.

Give the truth table for a Half Adder. Give a gate level Implementation of the same.

Voiceless it cries, wingless flutters, toothless bites, mouth-less mutters.

What is it?